UBUNTU-CVE-2026-11352 (CVE-2026-11352)
Vulnerability from osv_ubuntu – Published: 2026-06-24 14:00 – Updated: 2026-07-10 22:21 – Source websiteAn issue in curl’s QUIC UDP receive function allows a malicious HTTP/3 server to trigger a remote denial of service against a curl or libcurl client. Because the helper function discards zero-length UDP datagrams before counting them toward the per-call packet budget, a connected QUIC peer can continuously stream empty datagrams to indefinitely stall the client.
{
"affected": [
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "curl",
"binary_version": "8.18.0-1ubuntu2.3"
},
{
"binary_name": "libcurl3t64-gnutls",
"binary_version": "8.18.0-1ubuntu2.3"
},
{
"binary_name": "libcurl4t64",
"binary_version": "8.18.0-1ubuntu2.3"
}
],
"priority_reason": "Upstream defined this as low severity"
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "curl",
"purl": "pkg:deb/ubuntu/curl@8.18.0-1ubuntu2.3?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "8.18.0-1ubuntu2.3"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"8.14.1-2ubuntu1",
"8.17.0-1ubuntu1",
"8.18.0-1ubuntu1",
"8.18.0-1ubuntu2",
"8.18.0-1ubuntu2.1",
"8.18.0-1ubuntu2.2"
]
}
],
"aliases": [],
"details": "An issue in curl\u2019s QUIC UDP receive function allows a malicious HTTP/3 server to trigger a remote denial of service against a curl or libcurl client. Because the helper function discards zero-length UDP datagrams before counting them toward the per-call packet budget, a connected QUIC peer can continuously stream empty datagrams to indefinitely stall the client.",
"id": "UBUNTU-CVE-2026-11352",
"modified": "2026-07-10T22:21:39Z",
"published": "2026-06-24T14:00:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-11352"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-11352"
},
{
"type": "REPORT",
"url": "https://curl.se/L7HzKXisfJ/CVE-2026-11352.md"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-8525-1"
}
],
"related": [
"USN-8525-1"
],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-11352"
]
}
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